A ball is rolling across the floor at a constant speed. What will happen to the ball if it is exposed
to an unbalanced force in the same direction that it is moving?

-It will immediately stop
-it’s speed will decrease
-it’s speed will increase
-it’s motion will be unchanged

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.